Reversing-gearing.



G. P. HOLLISTER.

REVERSING GEARING. APPLICATION FILED NOV. 21, 1 910.

Patented June 23, 191% 3 SHEETEPSHEET 1.

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G. P. HOLLISTER.

REVERSING GEARING.

APPLICATION FILED NOV. 21, 1910.

Patented June 23, 1914.

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REVERSING GEARING.

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CLARENCE P. HOLLISTER, OF DETROIT, MICHIGAN, ASSIGNOR TO SMITH & BALDBIDGE MACHINECOMPANY, 0F DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

REVERSING-GEARING.

mo ern.

Specificationof Letters Patent. Patented June 23, 1914,

Application filed November 21, 1910. Serial No. 593,400

To all whom it may concern:

Be it known that I, CLARENCE P. HOL- LISTER, a citizen of the United States of America, residing at Detroit, in the county of Vfayne and State of Michigan, have in vented certain new and useful Improvements in Reversing-Gearing, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to that type of reversing gearing wherein the driving member, as for instance the engine shaft, rotates in one direction only, and it consists in the novel and simple construction of a reversing gear of this character, in the peculiar arrangement and combination of parts, and in certain details of construction and their arrangements and combinations, as will be more fully hereinafter described and claimed,

In the drawings,Figure 1 is a perspective view of an embodiment of my invention; Fi 2 is a vertical central longitudinal section through the mechanism, some of the parts being shown in elevation; Fig. 3 is a sectional perspective view illustrating the control mechanism for the brake and clutch;

Fig. 4c is an enlarged sectional view on line :cm of Fig. 3; Fig. 5 is an enlarged sectional perspective view, further illustrating the controlling means; Fig. 6 is an enlarged detail view of parts of the clutch operating means; and Fig. 7 is an enlarged sectional perspective view of a modification.

In the drawings thus briefly described, A represents a suitable inclosing casing mounted upon a power-transmitting shaft B, connected at its ends in a manner hereinafter described to a driving shaft, as for instance a crank shaft of an engine, 0, and at its opposite end to a driven shaft D, which may be the propeller shaft of a boat.

Loosely mounted upon the transmitting the crank shaft I and J represent step gears positioned within the gear cage and oppositely disposed. Each comprises a train including a plnion 5 upon the sleeve E, a gear 0 meshing therewith and fixed upon a stub-shaft cl, and a similar gear 6 also fixed upon the said shaft and meshing with a pinion f fixed upon the power-transmitting shaft B.

The drum F is provided on its exterior with a brake band L having abutments g and it upon its extremities, as shown in Fig. 5, the band serving upon actuation ofthe controlling lever hereinafter described to grip the drum and hold the same stationary, thus producing through the revolution of the gear trains about the transmitting shaft movement of the driven shaft D in a forward direction. A drum L adjoins the drum F, is fixed to the transmitting shaft by a suitable key, and is provided with a clutch'L in the form of a band, this being likewise actuated by the single operating memberpreviously referred to. Vfhen the clutch is applied, the drum L is locked to the drum F, rotates therewith, and through the gear trains the transmitting shaft B is rotated in the opposite or reverse direction, causing similar movement to be imparted to the driven shaft D;

The control mechanism for the reverse and forward drive is governed by the operating lever K fixed upon a rock shaft K j ournaled in suit-able hearings in the inclosing casing A, and in detail is of the following construction;

M represents a bell-crank lever pivoted to the casing and engaging the abutment 9 upon the brake band L. A set-screw z engages the complementary abutment 71, on the band, and serves as a means of adjustment for the band to allow of its proper operation.

O is a pivoted lever arm, the end of which shaft is fixed, by means of a clamp Q; a

sleeve Q and a cam member or incline P, the latter being adapted upon rotation of the rock shaft to engage the lever O, causing a depression of the bell-crank and the gripping of the drum F by its brake band The connection between the reel: shaft K and the drum F through the drum L comprises a yoke R projecting from the sleeve on the rock shaft, a lever arm- S pivoted upon a transverse shaft T for rocking movement and engaging the yoke It, a cam sleeve U mounted for sliding movement upon the transmitting shaft B, the sleeve being in continuous engagement with the lever S,arock arm V carrying a roller V engaging the cam sleeve, and a rock shaft W to which the arm V is secured engaging an incline or cam face Y upon one of the extremities of the clutch band L the opposite end of said bandbeing held by an adjustable abutment Z. The preferred form of engagement between the roclt shaft and incline is shown,

consisting of a recess a formed within the rock shaft immediately opposite the incline, theconstruction being such that asthe rock shaft is rotated the notch will be brought out of engagement with the incline,- allowing the shaft periphery to operate the latter to effect the clampingor clutching engagement desired.

The shaft IV is supported ina bearing sec- I tion /V" upon the drum F, and a weight is provided on the opposite side of the drum to counterbalance it.

In practice, the parts-being arranged and constructed as set forth, where it is desired to secure forward movement ofthe driven shaft from the driving member revolving; continuously in one direction, the controlling lever isshifted ina direction to cause the engagement of the brake band L with the drum F, the drum being thus heldj stationary, as before pointed out. For obtainingthe reversemovement, the lever is thrown in the opposite direction, causing the operation of'the clutchand the consequent lockingtogether of the drums with the resultant movement of the loose drum in unison with the transmitting shaft. Movement of the controlling lever into a neutral position, as indicated in Fig. 1, permits the engine or driving shaft to rotate without imparting motion to the driven member.

In Fig. 7 I have shown a modified form of clutch, consisting primarily of a spirally wrapped band, as A, One end, B, of the spiral is anchored in the drum F, while upon the opposite end-preferably opposite the point Ofianchorage-is a lateral'extension G adapted to be engaged by a lever arm D" pivoted to the periphery ofthe drum F and carrying at its lower end a roller E" in operative relation to the, cam sleeve U,

What I claim as my invention is,

1. In reversing gearing, the combination with a. power-transmitting shaft,,of complementaryv drums respectively fixed and loose thereon, gearing-between one of said drums and said shaft, a single operatinglever, and mechanism controlled by the lever aetingon the shifting of the latter in opposite direc tions to respectively hold the loose drum against movement and lock the drums to rotate-in unison.

2. In reversing gearing, the combination with apower transmitting shaft, of a. drum loosely mounted thereon, a, gear train be tween said" shaft and drum, a brake band encircling; the drum, a bell-crank lever for applying the band, a lever arm disposed transversely in relation to the bell-crank and engaging one of its arms, a rock shaft, a member thereon for operating the lever arm, and a control lever for actuating the shaft.

3. In reversing gearing, the combination with a power-transmitting shaft, of a fixed and a loosedrum thereon, coijperating gear trains between one of said" drums and said shaft, a band brake for the loose drum, and a clutch for the fixed drum carried by said loose drum, arock shaft, and asingle operating member -therefor, and an-0perating connection between said shaft and the brake and clutch.

4-. In reversinggearing, the combinationwith a power-transmitting shaft, of complementary drums respectively fixed and loose thereon, a gear train'uponone ofsaiddrums and connecting; said shaft, a hand brake for the loose drum, and a: clutchforthe fixed drum, a single control lever having 5. In reversing gearing, the combinationwith a power-transmitting shaft, complementary drums fixed and loose thereon, gearing on one of said drums and said shaft, a brake for the loose drum and a clutch for the fixed drum, a rock shaft and an operating lever therefor, a connection between said shaft and the brake, an arm upon the rock shaft, a cam sleeve upon the transmitting shaft, a lever fulcrumed for engagement with said sleeve and the rock shaft arm, andan operative connection between the cam sleeve and the brake band.

6. In reversing gearing, the combination with a, power transmitting shaft of complementary drums, respectively fixed and loose thereon, a gear train between one of said drums and said shaft, a clutch for the fixed drum carried by the loose drum, a brake for the latter drum, and a single control memher for alternately applying the brake and clutch.

7 In reversing gearing, the combination with a power transmitting shaft of complementary drums fixed and loose thereon, cooperating gears on said shaft and one of said drums, a brake-for the loose drum and a clutch for the fixed drum, a reel; shaft and cooperating lever therefor, a connection be- In testimony whereof I aifix my signature tween said shaft and brake, an arm upon in presence of two Witnesses. the rock shaft, a cam sleeve upon the transmitting shaft, a lever fulcrumed for engage CLARENCE HOLLISTER' 5 ment With said sleeve and the rock arm, and Witnesses:

an operative connection between the cam JAMES P. BARRY,

sleeve and brake band. AUBREY PULLEYBLANK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

